Liver monooxygenase system activity, responsible for liver detoxication, was examined with the use of antipyrin test in children and adults suffering from maxillofacial inflammations, as was their nonspecific resistance of the body. The findings evidence that inflammatory diseases are associated with a considerable reduction of the body nonspecific resistance and with depression of the liver monooxygenase system, most marked in acute inflammations. The severity of liver detoxication function disorder is in inverse relationship with the status of the body nonspecific resistance; this factor essentially influences the length of therapy.